Linear Electro-Optic Effect in Gases

Vibrational optical activity

“…Electric Rayleigh optical activity was first observed in 1980 in gaseous methyl chloride [158], but no electric ROA analogue has been observed to date.…”

On electric-quadrupole and magnetic-dipole contributions to optical rectification in isotropic media near optical resonance

“…for the achiral molecule CH 3 Cl (methyl chloride whose symmetry is described by the point group 3m(C 3V ) ) [40] giving a contribution to U m T which in our case is forbidden. In accordance with Refs.…”

“…It has been shown [2] that the interaction between macroscopic nondissipative media and time-varying electromagnetic fields can be described by a time-averaged potential function, the free energy density. Knowing this energy we can find an expression describing the static macroscopic electric polarization which, after comparing with (39) and (40), enables us to check that the nonlinear polarizabilities …”

Linear and Nonlinear Light Scattering from the Surfaces of Liquids

“…Since the complex polarisability (Xoef3 is unaffected by a reversal of the orientation of the molecule, and since reversal of an externally applied electric field F reverses the mean orientation of molecular dipoles, it might be expected that there is no linear effect of F on the optical properties of a fluid. However, there is a small linear effect of Fx on the intensity of circularly polarised light propagating in the z direction that is scattered in the y direction (Buckingham and Raab 1975;Buckingham and Shatwell 1980). This differential scattering-of the order of 1 part per million in a field of 10 6 Vm-1 -comes from the interference of the radiation from the induced electric dipole with that from the induced magnetic dipole and electric quadrupole in the polarised fluid.…”